# Services from mailcheck.netzhandwerker.de on Zero

> mailcheck.netzhandwerker.de serves 2 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/mailcheck.netzhandwerker.de
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/mailcheck.netzhandwerker.de/health.json

## Services

- [Agent Email Check (Single Address)](https://www.zero.xyz/c/agent-email-check-single-address-236fa689/llms.txt): $0.001/call via x402. Validates a single email address using DNS and blocklist checks, with an optional SMTP probe for definitive deliverability verdicts.
- [Agent Email Check – Batch Email Verification](https://www.zero.xyz/c/agent-email-check-batch-email-verification-ecdfc35a/llms.txt): $0.001/call via x402. Validates up to 100 email addresses per call using DNS and list-based checks, with optional SMTP probing, billed per address.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)